Dynamo-electric machine.



B. A. BEHREND.

DYNAMO ELEGTRIG MACHINE.

0N FILED NOV. 27, 1906.

Patented Nov. 16, 1909.

flerizamA Jib/wand.

. BY a? 1% B. A. BEHREND.

DYNAMO ELEOTRIG MACHINE.

' APPLICATION FILED NOV. 27, 1905. 940,632. w Patented Nov. 16, 1909.

2 SHEETS-SHEET 2. Fig-.3- F 5,. 4.

W Imam-ma:

I'm/asses: fleri zaidfl fieiu'end.

mnwiw. a. GRANAM c0 Puom-umocmmns. WASNIMORIN, u, c.

UNIT ST BERNARD ARTHUR BEHREND, OF NORNOOD, OHIO, ASSIGNOR TOALLIS-CEALMERS COMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCKELECTRIC IVIANU- FACTURING COMPANY, A CORPORATION OF OHIO.

DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Nov. 16, 191%.

To all whomc't may concern:

Be it known that I, BERNARD ARTHUR .Bnnnnxo, citizen of the UnitedStates, residing at Nor-wood, in the county of Hamilton and State ofOhio, have invented certain new and useful 1m )rovements in DynamoElectric Machines, of which the following is a full, clear, and exactspecification.

My invention relates to dynamo-electric machines and especially to themeans for supporting and holding in position the endturns of the statorcoils.

In a large multiphase generator of the rotating field type as ordinarilyconstructed, the outer ends of the armature coils are left unsupported.Between adjacent coil endturns there exist magnetic actions due to thefields enveloping said end-turns. Under ordinary working conditions themagnetic actions are not sufiicient to cause any clamage. However, ithas been found that if the armature is accidentally short circuited saidmagnetic fields become so great and the magnetic actions between theadjacent coil endturns are so intensified as to distort and twist theend-turns out of place, causing considerable damage. The object of myinvention is to so support and hold the end turns of the coils that thisdanger of injury to the coils due to the magnetic actions, in case ofaccidental shortcircuit of the armature, will be avoided.

In carrying out my invention, I provide a support for the end turns ofthe coils of the armature winding, which is preferably a distributedwinding, and separately or independently secure each coil to the supportby some means such as binding tape or cord.

More specifically considered, my invention consists of. adynamo-electric machine having a stationary member comprising anarmature core, a supporting frame and endshields or end-bells, armaturecoils having end-turns extending beyond the core, bolts extendingradially from each end-shield, an end-turn supporting ring secured tothe inner ends of the bolts of each end-shield, and means for fasteningthe end-turns to the supporting rings, whereby all danger ofdisplacement of the end-turns is avoided.

My inventionstill further consists of the details of construction andthe combinations of elements described in the specification and setforth in the appended claims.

Reference is had to the accompanying drawings in which Figure 1 is alongitudinal sectional elevation of a large turbo-alternator providedwith my invention; Fig. 2 is an end view of the same only two of thearmature coils however being shown; Fig. 3 is an enlarged detail of theend-turn supports shown in Fig. 1; Fig. 4: is an enlarged detailedendview of the support and Fig. 5 illustrates a slightly modified formof my invention.

Referring to the figures of the drawing I have shown at 10 a shaftcarrying the ordinary rotating field 11 of a turbo-generator. The statorcomprises a slotted core 12 consisting of groups of laminae held to theframe 13 and to the endheads 14 by hori zontal bolts 15. The armaturewinding is in this case an ordinary distributed winding held into theslots of the core in any suitable manner and provided with end-turns orportions 16 which project beyond the core. End-shields or end-bells 17,in this case integral with the end-heads 14, surround the endturns. Asthe machines are ordinarily constructed these end-turns are leftunsupported. It has been found however that in case the armature isshort circuited that the end-turns will be twisted or distorted out oftheir normal positions, due to the interactions of the intense fieldssurrounding the adjacent armature coils. in order that this danger ofinjury to the coils may be avoided I support the end-turns and hold themin relatively fixed position in such a manner that all danger ofdisplacement in case of short circuit is practically eliminated.

The end-shields 17 are each provided with curved inwardly extendingportions. lGxtending radially from the curved portion of each end-shield17 are a number of bolts 18 arranged at intervals around the entireshield. These bolts are threaded at their inner ends and are screwedinto and support an iron ring 19. Mounted on the inner surface of theiron ring is a wooden rin 20 built up preferably of a number ofsections. As shown in the drawings the end-turns 16 rest against theinner surface of the wooden ring and each turn is bound to the woodenand iron rings by cord, wire or tape 21, or any other suitable flexiblebinding material.

In Fig. 5 the bolts 18, in addition to supporting the rings and theend-turns, support the ordinary end connectors, which connect thediti'erent poles of each phase. The bolts are shown as insulated bytubes Two cross connectors are. shown at 28 bound to the insulatingtubes 22, by cord or wire 24;. it is to he understood that as many crossconnectors desired may be supported in the manner shown.

it will be seen that the end-tnrns ol' the coils will be eti'ectivelyheld in position and that displacennmt will be impossible. The (tistruetion is simple and the parts can be easily assembled or removedwhen desired.

l do not wish to be conlined to the details ot construction, but myinvention is susceptible ot considerable modilication. l aim in theappended claims to cover all modilica tions which do not depart ll'tllll the spirit of my invention.

What t claim as new and desire Letters Patent is:

l. in a dynainn-electric machine, a. sta tionary armature comprising acore, a distributed armature winding conn arising coils having portionsprojecting beyond the core, a stationary suptanting member to! the,projecting portions ol the coils, and separate means 'liastening eachcoil independently to said supporting member.

2. In a dynamo-electric machine, a stationary armature, armature coilshaving end-turns extending beyond the ends oi the arimiturc core endheads and shields, supports tor the end-turns secured to the endshields, and means engaging the end-tnrnr'i and the supports :t'orsecuring the end-turns to the supports.

3. In a dynamo-clectric machine, a sta tionary armature comprising acore and supporting :trame, distributed armature winding compr1singcoils having end-turns extending beyond the core, a supporting ring torthe end turns, and means binding the end-turns to the supporting ring. 7

l-. in a l \'ll2ti1l(i-0l(3til'lti machine, a stanary armature conurising a core, a disibuted armature winding comprising coils :vingend-turns extending beyond the core, l end-turn supporting ring, and.means fl l' fastening each end-turn separately and intlepe:ntentl tothe ring.

5. in a dynamo-eltwtric machine, a stationary armature comprising acore, a core supporting frame, a distriln'ited armature windingcomprising coils having end-turns extending beyond said core, supportingrings for the end-turns secured to the lrame oil the machine, and meansengaging the rings and end-turns tor fastening said endturns to thesupporting rings.

(3. in a dynamoelectric machine, a stationary armature and supportinglrame therefor, armature coils having end -turns extending beyond thecore, an overhanging shield or belt at each end of the *lrame, a coilend-turn supporting ring secured at intervals to each end-shield orbell, and means tor 'lasleuing each end-turn independently to asupporting ring.

T. In a dynamo-chartric machine, a sla tionary armature comprising acore and supporting 'lraine, end-shields or bells. armature coils havingend turns, radial bolts extending at intervals lrom each o'l saidend-shields, a ring supported on the inner ends ot the bolts extendingfrom each end shield, and means tor binding the end-turns to said rings.

8. in a dyinnno-electric machine, a stationary member comprising anarmature core, a supporting frame, and end-shields or bells, armaturecoils having end-turns extending beyond the core, bolts extendingradially "from each end -sh.ield, an end-turn supporting ring secured tothe inner ends at the bolts of each end-shield, means for tastening saidend-turns to the supporting rings, and end connectors support ed on saidradial bolts.

9. in an alternating current dynamo-electric machine, a core and an endmember. armature coils having end-turns, connectors between the coils ofthe poles (it each phase, and insulated bolts mounted on the end membertor supporting the cnd-turns and end-eonnectors.

in testimony whereot l7 a'l'lix my signature, in the presence ole twowitnesses.

lililNAlllr Ali'iltllll lll'lllllllhll. Witnesses:

Lanna E. \l nneu, An'rutu: l Kwis.

